2038340- Logs full of 'POST zkau/comet' requests

Symptom

A problem with a massive amount of AJAX requests was noticed in some projects, sometimes up to 1,000 requests per minute. The common symptom was that there were many access log entries with requests containing the phrase /zkau/comet.

So many requests generate a huge load on the server and have a bad effect on performance.

ZK Bug - Massive Load Due to ZK problem

Case Study - Session Expired

Note: If the hybris platform version is lower than 4.6, or cockpit extensions were generated before 4.6, please check if the problem is connected with the reported bug.

If a browser session expires, the browser starts sending requests very quickly (many requests per second) and ZK doesn't have a proper default logic for this situation.

We found a tremendous amount of requests such as these in the access log: